Design and analysis of a parallel hydraulic – pneumatic regenerative braking system for heavy-duty hybrid vehicles

Bravo, Rafael Rivelino Silva; Negri, Victor Juliano De; Oliveira, Amir Antônio Martins

doi:10.1016/j.apenergy.2018.04.102

Cited by 72 publications

(32 citation statements)

References 20 publications

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“…For braking, considering the minimum braking force that could be provided through the variable displacement motor/ pump and SOC of the accumulator [6], the "I" curve distribution strategy based on critical braking strength z min was adopted to fully recover the braking energy. At present, most of the research on the energy management strategy of the WDHHV has remained in the simulation stage [3], [7] to [9], which is not sufficiently credible for practical application. To conduct the study, a test bench was built, on which an electric motor was used to simulate the ICE.…”

Section: Methodsmentioning

confidence: 99%

Power-Following Control Strategy of a Wheel-Drive Hydraulic Hybrid Vehicle

Zhang

Wang

et al. 2020

SV-JME

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Energy management strategy is a critical technology for improving the fuel economy of wheel-drive hydraulic hybrid vehicles. For driving, a power-following control strategy is proposed in this study by adding several working points of the engine in the optimal fuel economy power curve. For braking, the “I” curve distribution strategy based on critical braking strength zmin was adopted. A test bench was constructed according to the quarter of the prototype vehicle. Taking the typical working conditions of Federal Urban Driving Schedule (FUDS) and the selfset extra-urban driving schedule (EUDC-1) cycle condition into consideration, the energy management strategy was studied. The torque and speed of the simulated engine and pressure of the accumulator were obtained. The test fuel consumption in this research was compared with the original fuel consumption of the prototype vehicle. It was found that the proposed energy management strategy could effectively improve the fuel economy by more than 24 % under the requirement of satisfying the dynamic performance of the whole vehicle.

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Section: Methodsmentioning

confidence: 99%

Power-Following Control Strategy of a Wheel-Drive Hydraulic Hybrid Vehicle

Zhang

Wang

et al. 2020

SV-JME

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“…Hybrid electric vehicles have higher energy density than HHVs, which makes them applicable for specific system architectures. In contrast, the great power density of HHVs offers superior technology in urban environments that require frequent stops and starts, which is suitable for applications, such 2 of 23 as refuge trucks and buses [8][9][10][11][12][13]. Due to the characteristics of both systems, their advantages have been considered together for studies investigating hydraulic-electric synergy systems [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

System Characteristics Analysis for Energy Management of Power-Split Hydraulic Hybrids

Kwon

Ivantysynova

2020

Energies

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Hydraulic hybrid powertrains provide an opportunity for specific applications, such as heavy-duty vehicles based on high-power density, which has not been included in other types of hybrid powertrains. Among the various architectures of hybrid vehicles, power-split hybrids have a greater possibility of producing better fuel efficiency than other hybrid architectures. This study analyzed the possible energy-saving characteristics of power-split hydraulic hybrid vehicles (HHVs); this has not been comprehensively described in previous studies. A typical configuration of power-split HHVs was modeled with the FTP-72 driving cycle using a novel simulation method that considered the dynamic and thermal behaviors together. The characteristics were analyzed in comparison to a power-split hydrostatic transmission (HST), which is designed with the same conditions except for hydraulic energy storage. The power-split HHV not only has a better fuel efficiency, but it also shows system energy-saving characteristics. The power-split HHV has more chances for engine idling, which is directly related to fuel consumption savings due to engine stop. Additionally, more engine idling time enables the system to operate in a more efficient area on the engine map by load leveling. The results for the system temperature show that the power-split HHV offers the possibility to deliver better thermal management because it prevents the waste of braking power, which is especially crucial for hydraulic systems in comparison to other power systems such as electric or mechanical power systems. The ease of thermal management results in less energy consumption for cooling down the system temperature by minimizing the cooling system, as well as in a better thermal stability for the hydraulic system. The power-split HHV characteristics analyzed in this study can be used to design and organize the system control logic while developing power-split HHVs.

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“…The use of hydraulic accumulators significantly decreases the frequency of pump switches, increasing its service period. Hydraulic accumulators are used in various fields of the engineering: in water supply and other pressure pipelines (Zhuk et al, 2016;Shi et al, 2019), hydro drive systems (Puddu & Paderi, 2013;Kumar et al, 2017;Bravo et al, 2018;Wu et al, 2019), energy engineering (Morozov et al, 2017), etc.…”

Section: Introductionmentioning

confidence: 99%

Experimental Integral Regulating Parameters of a Bladder-Type Hydraulic Accumulator

Zhuk¹,

Verbovskyi²,

Popadiuk³

et al. 2020

Theory build. pract.

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Main factors influencing the regulating parameters of gas-charged hydraulic accumulators are thermodynamic processes occurring during the gas compression and expansion. Method of experimental determination of the polytropic index of gas processes in the hydraulic accumulator is improved. An experimental setup was installed for the investigation of integral regulating parameters of the bladder-type hydraulic accumulator. The parameters of non-stationary expansion of the air in the accumulator's shell during its operation with a simple short pipeline are experimentally investigated and analyzed. Polytropic index was regularly decreasing in the cycles #1 to #4 from 2.07 to 1.95. Storage volume of hydraulic accumulator, at the same time, increased on 6.0 % while discharge time decreased on 3.6 %. Obtained experimental trends are explained by the transient thermodynamic processes in the gas inside the hydraulic accumulator before the dynamic equilibrium with the external environment is established.

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Design and analysis of a parallel hydraulic – pneumatic regenerative braking system for heavy-duty hybrid vehicles

Cited by 72 publications

References 20 publications

Power-Following Control Strategy of a Wheel-Drive Hydraulic Hybrid Vehicle

Power-Following Control Strategy of a Wheel-Drive Hydraulic Hybrid Vehicle

System Characteristics Analysis for Energy Management of Power-Split Hydraulic Hybrids

Experimental Integral Regulating Parameters of a Bladder-Type Hydraulic Accumulator

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